---
title: ALTER MATERIALIZED VIEW 
---

Changes the definition of a materialized view.

## <a id="section2"></a>Synopsis 

``` {#sql_command_synopsis}
ALTER MATERIALIZED VIEW [ IF EXISTS ] <name> <action> [, ... ]
ALTER MATERIALIZED VIEW [ IF EXISTS ] <name>
    RENAME [ COLUMN ] <column_name> TO <new_column_name>
ALTER MATERIALIZED VIEW [ IF EXISTS ] <name>
    RENAME TO <new_name>
ALTER MATERIALIZED VIEW [ IF EXISTS ] <name>
    SET SCHEMA <new_schema>
ALTER MATERIALIZED VIEW ALL IN TABLESPACE <name> [ OWNED BY <role_name> [, ... ] ]
    SET TABLESPACE <new_tablespace> [ NOWAIT ]

where <action> is one of:

    ALTER [ COLUMN ] <column_name> SET STATISTICS <integer>
    ALTER [ COLUMN ] <column_name> SET ( <attribute_option> = <value> [, ... ] )
    ALTER [ COLUMN ] <column_name> RESET ( <attribute_option> [, ... ] )
    ALTER [ COLUMN ] <column_name> SET STORAGE { PLAIN | EXTERNAL | EXTENDED | MAIN }
    CLUSTER ON <index_name>
    SET WITHOUT CLUSTER
    SET ( <storage_paramete>r = <value> [, ... ] )
    RESET ( <storage_parameter> [, ... ] )
    OWNER TO <new_owner>
```

## <a id="section3"></a>Description 

`ALTER MATERIALIZED VIEW` changes various auxiliary properties of an existing materialized view.

You must own the materialized view to use `ALTER MATERIALIZED VIEW`. To change a materialized view's schema, you must also have `CREATE` privilege on the new schema. To alter the owner, you must also be a direct or indirect member of the new owning role, and that role must have `CREATE` privilege on the materialized view's schema. \(These restrictions enforce that altering the owner doesn't do anything you couldn't do by dropping and recreating the materialized view. However, a superuser can alter ownership of any view anyway.\)

The statement subforms and actions available for `ALTER MATERIALIZED VIEW` are a subset of those available for `ALTER TABLE`, and have the same meaning when used for materialized views. See the descriptions for [ALTER TABLE](ALTER_TABLE.html) for details.

## <a id="section4"></a>Parameters 

name
:   The name \(optionally schema-qualified\) of an existing materialized view.

column\_name
:   Name of a new or existing column.

new\_column\_name
:   New name for an existing column.

new\_owner
:   The user name of the new owner of the materialized view.

new\_name
:   The new name for the materialized view.

new\_schema
:   The new schema for the materialized view.

## <a id="section6"></a>Examples 

To rename the materialized view foo to bar:

```
ALTER MATERIALIZED VIEW foo RENAME TO bar;
```

## <a id="section7"></a>Compatibility 

`ALTER MATERIALIZED VIEW` is a Greenplum Database extension of the SQL standard.

## <a id="section8"></a>See Also 

[CREATE MATERIALIZED VIEW](CREATE_MATERIALIZED_VIEW.html), [DROP MATERIALIZED VIEW](DROP_MATERIALIZED_VIEW.html), [REFRESH MATERIALIZED VIEW](REFRESH_MATERIALIZED_VIEW.html)

**Parent topic:** [SQL Commands](../sql_commands/sql_ref.html)

